Fix FreeBSD CI: use cross-platform-actions v0.31.0 for FreeBSD 15 support

Author: renaudallard

.github/workflows/freebsd.yml

@@ -39,7 +39,7 @@ jobs:
         uses: actions/checkout@v6
 
       - name: Build and test on FreeBSD
-        uses: cross-platform-actions/action@v0.25.0
+        uses: cross-platform-actions/action@v0.31.0
         with:
           operating_system: freebsd
           version: "${{ needs.detect-freebsd.outputs.version }}"